Ivchenko AI-8

AI-8
Type	Auxiliary Power Unit (APU)
National origin	USSR
Manufacturer	Ivchenko / Ivchenko-Progress / Motor Sich

The Ivchenko AI-8 is an aircraft auxiliary power unit developed and produced by Ivchenko-Progress and Motor Sich.

Variants

AI-8

The base model which is used to generate electricity or supply compressed air to air-start systems. It can also be used as cabin heating if necessary.

Specifications (AI-8)

Data from Aircraft engines of the World 1970 ^[1]

General characteristics

• Type: Auxiliary Power Unit (APU)
• Length: 725 mm (28.5 in)
  
• Width: 600 mm (24 in)
• Height: 550 mm (22 in)
• Diameter: ~500 mm (20 in) casing diameter
• Dry weight: 145 kg (320 lb)

Components

• Compressor: 1-stage centrifugal compressor
• Combustors: Annular combustion chamber with 6 fuel injectors
• Turbine: 1-stage axial turbine (gas generator) ; 1-stage (free power turbine) - generator drive at 4:1 ratio
• Fuel type: Aviation Kerosene such as JP-4

Performance

• Maximum power output: 75 kW (100 shp) at 37,000 rpm or 60 kW DC from TCP-24 electric generator at 9,250 rpm gearbox output
• Overall pressure ratio: 3.15:1
• Air mass flow: 1.75 kg/s (231 lb/min) at 37,000 rpm
• Fuel consumption: 120 kg/h (260 lb/h) maximum
• Power-to-weight ratio: 0.51 kW/kg (0.31 shp/lb)

References

1. Wilkinson, Paul H. (1970). Aircraft engines of the World 1970 (21st ed.). Washington D.C.: Paul H. Wilkinson. p. 216.